When creating a new price break for a supplier part, default to using the currency code specified for the supplier company

InvenTree/common/models.py

@@ -464,7 +464,14 @@ class PriceBreak(models.Model):
     class Meta:
         abstract = True
 
-    quantity = InvenTree.fields.RoundingDecimalField(max_digits=15, decimal_places=5, default=1, validators=[MinValueValidator(1)])
+    quantity = InvenTree.fields.RoundingDecimalField(
+        max_digits=15,
+        decimal_places=5,
+        default=1,
+        validators=[MinValueValidator(1)],
+        verbose_name=_('Quantity'),
+        help_text=_('Price break quantity'),
+    )
 
     price = MoneyField(
         max_digits=19,

InvenTree/company/forms.py

@@ -107,7 +107,12 @@ class EditSupplierPartForm(HelperForm):
 class EditPriceBreakForm(HelperForm):
     """ Form for creating / editing a supplier price break """
 
-    quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5)
+    quantity = RoundingDecimalFormField(
+        max_digits=10,
+        decimal_places=5,
+        label=_('Quantity'),
+        help_text=_('Price break quantity'),
+    )
 
     class Meta:
         model = SupplierPriceBreak

InvenTree/company/migrations/0030_auto_20201112_1112.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.0.7 on 2020-11-12 00:12
+
+import InvenTree.fields
+import django.core.validators
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('company', '0029_company_currency'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='supplierpricebreak',
+            name='quantity',
+            field=InvenTree.fields.RoundingDecimalField(decimal_places=5, default=1, help_text='Price break quantity', max_digits=15, validators=[django.core.validators.MinValueValidator(1)], verbose_name='Quantity'),
+        ),
+    ]

InvenTree/company/models.py

@@ -17,6 +17,8 @@ from django.db.models import Sum, Q, UniqueConstraint
 from django.apps import apps
 from django.urls import reverse
 
+from moneyed import CURRENCIES
+
 from markdownx.models import MarkdownxField
 
 from stdimage.models import StdImageField
@@ -29,6 +31,7 @@ from InvenTree.status_codes import PurchaseOrderStatus
 import InvenTree.validators
 
 import common.models
+import common.settings
 
 
 def rename_company_image(instance, filename):
@@ -137,6 +140,22 @@ class Company(models.Model):
         validators=[InvenTree.validators.validate_currency_code],
     )
 
+    @property
+    def currency_code(self):
+        """
+        Return the currency code associated with this company.
+        
+        - If the currency code is invalid, use the default currency
+        - If the currency code is not specified, use the default currency
+        """
+
+        code = self.currency
+
+        if code not in CURRENCIES:
+            code = common.settings.currency_code_default()
+
+        return code
+
     def __str__(self):
         """ Get string representation of a Company """
         return "{n} - {d}".format(n=self.name, d=self.description)

InvenTree/company/views.py

@@ -30,6 +30,7 @@ from .forms import EditSupplierPartForm
 from .forms import EditPriceBreakForm
 
 import common.models
+import common.settings
 
 
 class CompanyIndex(InvenTreeRoleMixin, ListView):
@@ -419,10 +420,23 @@ class PriceBreakCreate(AjaxCreateView):
         }
 
     def get_part(self):
+        """
+        Attempt to extract SupplierPart object from the supplied data.
+        """
+
         try:
-            return SupplierPart.objects.get(id=self.request.GET.get('part'))
-        except SupplierPart.DoesNotExist:
-            return SupplierPart.objects.get(id=self.request.POST.get('part'))
+            supplier_part = SupplierPart.objects.get(pk=self.request.GET.get('part'))
+            return supplier_part
+        except (ValueError, SupplierPart.DoesNotExist):
+            pass
+
+        try:
+            supplier_part = SupplierPart.objects.get(pk=self.request.POST.get('part'))
+            return supplier_part
+        except (ValueError, SupplierPart.DoesNotExist):
+            pass
+
+        return None
 
     def get_form(self):
 
@@ -435,12 +449,19 @@ class PriceBreakCreate(AjaxCreateView):
 
         initials = super(AjaxCreateView, self).get_initial()
 
+        supplier_part = self.get_part()
+
         initials['part'] = self.get_part()
 
-        default_currency = common.models.InvenTreeSetting.get_setting('INVENTREE_DEFAULT_CURRENCY')
-        currency = CURRENCIES.get(default_currency, None)
+        if supplier_part is not None:
+            currency_code = supplier_part.supplier.currency_code
+        else:
+            currency_code = common.settings.currency_code_default()
 
-        if currency is not None:
+        # Extract the currency object associated with the code
+        currency = CURRENCIES.get(currency_code, None)
+        
+        if currency:
             initials['price'] = [1.0, currency]
 
         return initials

InvenTree/part/migrations/0059_auto_20201112_1112.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.0.7 on 2020-11-12 00:12
+
+import InvenTree.fields
+import django.core.validators
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0058_remove_partsellpricebreak_cost'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='partsellpricebreak',
+            name='quantity',
+            field=InvenTree.fields.RoundingDecimalField(decimal_places=5, default=1, help_text='Price break quantity', max_digits=15, validators=[django.core.validators.MinValueValidator(1)], verbose_name='Quantity'),
+        ),
+    ]